Im unable to send a file of 4gb into 16gb pendrive

the pendrives are proably fat32,
you can't have files larger than 4 gb on an fat32 partition

EDIT: if the pendrive isn't bootable or you don't plan on putting an bootloader on the pendrive then you can convert it to ntfs,
if you don't know how to do that just reply
sorry for my bad english

can u send me the complete safe procedure on my email with screen shots

sazidalvi@gmail.com